IBM 6623 User Manual
Memory
problems
Symptom
Suggested
action
The
amount
of
system
memory
displayed
is
less
than
the
amount
of
physical
memory
installed.
v
Make
sure
that:
–
The
DIMMs
are
seated
correctly.
–
You
have
installed
the
correct
type
of
memory.
–
If
you
changed
the
memory,
you
updated
the
memory
configuration
with
the
Configuration/Setup
Utility
program.
–
All
banks
of
memory
are
enabled.
The
computer
might
have
automatically
disabled
a
memory
bank
when
it
detected
a
problem,
or
a
memory
bank
could
have
been
manually
disabled.
v
Check
POST
error
log
for
error
message
289:
–
If
the
DIMM
was
disabled
by
a
system-management
interrupt
(SMI),
replace
the
DIMM.
–
If
the
DIMM
was
disabled
by
the
user
or
by
POST,
run
the
Configuration/Setup
Utility
program
and
enable
the
DIMM.
If
the
problem
remains,
call
for
service.
Microprocessor
problems
Symptom
Suggested
action
The
computer
emits
a
continuous
tone
during
POST.
The
startup
(boot)
microprocessor
is
not
working
correctly.
Call
for
service.
Monitor
problems
Symptom
Suggested
action
The
screen
is
blank.
Make
sure
that:
v
The
computer
power
cord
is
connected
to
the
computer
and
a
working
electrical
outlet.
v
The
monitor
cables
are
connected
correctly.
v
The
monitor
is
turned
on
and
the
brightness
and
contrast
controls
are
adjusted
correctly.
If
the
problem
remains,
call
for
service.
Only
the
cursor
appears.
Call
for
service.
The
monitor
works
when
you
turn
on
the
computer,
but
the
screen
goes
blank
when
you
start
some
application
programs.
Make
sure
that:
v
The
application
program
is
not
setting
a
display
mode
higher
than
the
capability
of
the
monitor.
v
The
primary
monitor
cable
is
connected
to
the
video
connector.
v
You
have
installed
the
necessary
device
drivers
for
the
application
programs.
If
the
problem
remains,
call
for
service.
Chapter
5.
Solving
problems
63